<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

<el-button type="text" @click="openDialogChapter()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
  
    <el-form label-width="120px">
      <div>
      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
      </el-form-item>
      </div>
    </el-form>
        <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>


        <!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
      </el-radio-group>
    </el-form-item>

    <el-form-item label="上传视频">
        <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAliVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>

  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>
  </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default {
    data() {
        return {
            saveBtnDisabled:false,
            courseId:'',//课程id
            chapterVideoList:[],
            chapter:{
              title:'',
              sort:0
            },
            dialogChapterFormVisible:false,//章节弹框
            dialogVideoFormVisible:false,
            video:{
              title:'',
              sort:0,
              free:0,
              videoSourceId:'',
              videoOriginalName:''//视频名称
            },
            fileList:[],
            BASE_API: process.env.BASE_API // 接口API地址

        }
    },
    created() {
      //获取路由id
      //判断路径有id值,做修改
      if(this.$route.params && this.$route.params.id) {

        this.courseId = this.$route.params.id
        this.getChapterValue()
      }
    },
    methods:{


      //============上传视频方法=====================
      handleVodUploadSuccess(response, file, fileList){
        this.video.videoSourceId = response.data.videoId
         //上传视频名称赋值
            this.video.videoOriginalName = file.name

      },
      //弹框
      beforeVodRemove(file,fileList){
        return this.$confirm(`确定移除 ${ file.name }？`);
      },
      // 点击调用接口删除，
      handleVodRemove(){
        video.removeAliVideo(this.video.videoSourceId)
            .then(response =>{
              this.$message({
                     type: 'success',
                     message: '删除视频成功!'
                })
                //文件列表清空
                this.fileList = []
                //清空删除的视频id和名称
                this.video.videoSourceId = ''
                this.video.videoOriginalName = ''
            })
      },
      handleUploadExceed(){},
      



// ===========================小节操作===========================
      openVideo(chapterId){
        this.video={}
        //新增弹窗
        this.dialogVideoFormVisible = true
        // 设置章节id
        this.video.chapterId = chapterId

      },
      //修改小节弹窗数据回显
      openEditVideo(id){
        this.dialogVideoFormVisible = true
        video.getVideo(id)
        .then(response=>{//请求成功
                this.video = response.data.video
                console.log(this.video)
                console.log(this.video.videoOriginalName)
                if(this.video.videoOriginalName!=null){
                  this.fileList = [{name: this.video.videoOriginalName}]
                }else{
                  this.fileList = []
                } 
            })
            this.getChapterValue()
      },
      //添加小节
      addVideo(){
        //设置课程id
        this.video.courseId = this.courseId
        video.addVideo(this.video)
            .then(response =>{
              this.dialogVideoFormVisible = false
              this.$message({
                     type: 'success',
                     message: '添加小节成功!'
                })
                this.getChapterValue()
                this.video = {}
                this.fileList = []
            })
      },
      //修改小节
       updateVideo(){
         video.updateVideo(this.video)
          .then(response =>{
            this.dialogVideoFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '修改小节成功!'
                    });
                    this.video = {}
                    this.fileList = []
                    this.getChapterValue()
          })
       } ,
      saveOrUpdateVideo(){
        this.video.id?this.updateVideo():this.addVideo()

      },
      removeVideo(id){
         this.$confirm('此操作将永久删除小节记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
             video.deleteVideo(id)
            .then(response=>{//请求成功
                this.$message({
                     type: 'success',
                     message: '删除小节成功!'
                })
                this.fileList = []
                this.getChapterValue()
            })
        })
      },


// ========================章节操作===========================

      //删除章节
      removeChapter(chapterId){
             this.$confirm('此操作将永久删除章节记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
             chapter.deleteChapter(chapterId)
            .then(response=>{//请求成功
                this.$message({
                     type: 'success',
                     message: '删除成功!'
                })
                this.getChapterValue()
            })
        })
        },


      // 修改章节弹窗数据回显
      openEditChatper(chapterId){
        this.dialogChapterFormVisible = true
        chapter.getChapter(chapterId)
          .then(response =>{
            this.chapter = response.data.chapter
          })
      },

      openDialogChapter(){
        // 添加弹窗清空原数据
        this.dialogChapterFormVisible = true
        this.chapter={}
      },
      updateChapter(){
        chapter.updateChapter(this.chapter)
          .then(response =>{
            this.dialogChapterFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
                    this.getChapterValue()
          })
      },
      addChapter(){
        this.chapter.courseId = this.courseId
        chapter.addChapter(this.chapter)
          .then(response =>{
            this.dialogChapterFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
                    this.getChapterValue()
          })
      },
      saveOrUpdate(){
        this.chapter.id?this.updateChapter():this.addChapter()
      },
      getChapterValue(){
        chapter.getChapterList(this.courseId)
        .then(response => {
                    this.chapterVideoList = response.data.item
                })
      },
        previous() {
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next() {
            //跳转到第二步
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
  position: relative;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
    position: relative;
    z-index: 1;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>